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Finding the Fourth Proportional to 939.96, 1,297.55 and 880.92

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Solution

The fourth proportional to 939.96, 1,297.55 and 880.92 is: 1,216.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.96 : 1,297.55 = 880.92 : x
  2. Step 2: Convert to fraction form
    939.96/1,297.55 = 880.92/x
  3. Step 3: Cross multiply
    939.96x = 1,297.55 × 880.92
  4. Step 4: Simplify right side
    939.96x = 1,143,039.95
  5. Step 5: Solve for x
    x = 1,143,039.95/939.96
  6. Step 6: Final answer
    x = 1,216.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.